Card mounting machine



Oct. 9, 1945.

A. H. SCHAUB CARD MOUNTING MACHINE 2 Sheets-Sheet l Filed April 20, 1943 Oct. 9, 1945. I A,-

SCHAUB 2,386,718

CARD MOUNTING MACHINE Filed April 20, 1943 z sneet -snee't 2 Patented Oct. 9, 1945 CARD MOUNTING MACHINE Andre Heinrich Schaub, N orrkoping, Sweden, assignor to Aktiebolaget Kardbeslag, a corpora- ,tion of Sweden Application April 20, 1943, Serial No. 483,809 In Germany April 27, 1942 20 Claims.

The present invention relates to machines for mounting fillets of card clothing on drums or rolls for carding or similar machines; It is well known that for a perfect operation of carding drums or rolls, it is necessary that the card fillet be mounted on the drum or roll at a constant tension, since an increase aswell as a decrease of the tension on the fillet results in heavy inconveniences which reduce the life of the card clothing and deteriorate the quality of the material to be treated in the carding machine. Various card mounting machines have been proposed, Which sufier from a number of inconveniences in the practical peration and in which the maintenance of a constant tension on the fillet of card clothing is dependent on the skill and experience of the operator.

Card mounting machines hitherto known are exclusively provided with manually adjustable means for efiecting a preliminary braking of the fillet, which means in connection with an additional friction device produces the required tension on the fillet, the fillet leaving the braking means being conducted over a spring actuated roller or the like member actuating an indicator which shows the tension on the fillet prevailing at any time on the portion of the fillet located between the braking means and the card drum or roll. In these known devices, the tension on the fillet is thus controlled manually, the indi-- cator having for its purpose only to indicate variations in the braking force which may occur for some reason or other, such as a result of variations, in the velocity of the fillet. Whether the tension on the fillet really can be maintained at a constant value or not is exclusively depending upon the skill and experience of the workmen operating the card mounting machine. In order to be sure in this respect, it is therefore necessary to have a special workman control the indicating device so as to overcome, as rapidly as possible, variations in the tension on the fillet. It will be obvious, however, that the predetermined tension on the fillet cannot exactly be maintained in this manner.

In previously known card mounting machines, the means for efiecting a preliminary braking of the fillet is constructed such as to brake the fillet between two metal surfaces, with the result'that card clothings having long and soft teeth as well as card clothings provided with teeth which are bent through great angles are likely to be damaged when passing between said surfaces. Consequently, such devices can be used only for card clothings having relatively short and steep'teeth.

' on the shaft The present invention has for its object to avoid the above indicated inconveniences and to provide a card mounting machine in which the upper side of the fillet is entirely kept free from pressure so that fillets having long and soft teeth or teeth bent through great angles can be mounted without being damaged, and in which any required tension on the fillet can be adjustedand automatically maintained constant under all working conditions without the necessity of controlling the tension. This and other objects are attained by mechanism illustrated in the accompanying drawings, in which: I

Fig. 1 is a sectional view of the card mounting device, the section being taken through the axes of the braking rollers. Fig. 2 is an end elevation of the card mounting device as viewed from the left in Fig. 1. Figs. 3 and 4 illustrate me diagrammatic manner a modification of sOme parts of the card mounting machine.

The various parts of the card mounting machine are mounted in two vertical end plates l and 2 which by suitable means are spaced relative 'to each other and which are provided with claw-like members 3 and 4 which to some extent surround horizontal guide bars or tubes 5 and 6, respectively, in a manner such that the card mounting machine is supported by said guide bars and can be displaced longitudinally of said bars. 'Betwe'en'the claws and the bars, there are preferably arranged antifriction members, such as rollers, ball bearings and thelike members not shown in'the drawing. Between the lower claw 4 and the bar 6, thereis arranged a sleeve! which is displaceable on the bar 6 by means of a ball bearing or similar member not shown in the drawing.

In the embodimentshown, the braking device consists of two braking rollers 8 and 9 disposed coaxially with respect to each other and provided with a friction coating I l) and ll,v respectively, for cooperation with the fillet to be mounted. The braking roller 8 is loosely mounted on a sleeve '12 having a cylindrical outer face and being se- '-cured to the end-plate l by means of screws I3.

The sleeve I2 acts as a stationar nut as its inner surface is provided with threads M for cooperation with a threaded portion of a shaft 15. The braking roller 9 is likewise loosely mounted l5. Between the adjacent end jaws of the braking rollers 8 and 9, there is provided a friction ring I6 consisting of leather or any other suitable material. A similar friction ring I! is disposed between the braking roller 8 and a flanged portion 18 of the sleeve [2. By

the end plate I, there is secured an arm 2| which near its outer end carries a freely rotatabl'e'roller 22 suitably mounted on ball bearings not'shown in the drawings. At some distance from the arm 2|, there is arranged, by aneans of bolts 23 and 24, a guide bar 25 connected with the arm2| and: located parallel thereto. A slide block 2 6 dis",

placeably mounted on the guide bar 25 is by means of a cord or wire 28, which runs over a guide roller 21, connected with a roller 29 the shaft of which is acted upon by a torsional spring (not shown) disposed in a spring case 30. Consequently, the slide block ,26 is always forced against the guide bar 25. The tension of the torsional spring can be adjusted by means of a pin 41.

Upon turning movement of the arm 2 I, the slide block 26 is guided by means of a guide link 3| which, according to the embodiment shown, is provided with a circular slot 32, the center of which is coinciding with the axis of the pivot of the arm 2|. By means of crosspieces 33 and 34, the guide link 3| is mountedon a guide rod 35 and a screw spindle 36, said guide rod and screw spindle being in turn mounted in cross pieces 31 and 38 connected with the end plate I. The screw spindle 36 carries on its outer end a handle 39 by means of which the spindle can be rotated and, consequently, the guide link 3| be moved towards or away from the pivot of the arm 2|. The rod 35 is on its outer side bevelled as at 40 and provided with a scale 4| on which the position of the guide link 3| can be controlled by means of a pointer 42 secured to the guide link. The scale is advantageously graduated such that the tension on the fillet can be directly read-off thereon.

The fillet is guided by means of stationary guide members 43 and 44 and loosely mounted guide rollers 45 and 46v disposedbetween the end plates and 2'.

The fillet to be mounted is laterally introduced on the guide member 43 and passes therefrom onto and around the braking roller 3, onto the guide member 44 and onto the second brakingroller 8. As indicated in Fig. 2 by the dot-anddash line 48, the fillet then passes from the roller 8 onto the roller 22 mounted on the arm 2| and hence by the section indicated by the dot-anddash line 49 to the guide roller 45 and, if necessary, over the guide roller 46 to the carding drum or roll not shown in the drawings.

The axis of the supporting shaft of arm 22 is displaced from the medial plane between the fillet 48, 49 being closer to the fillet portion 48; and the resultant of the tensions in fillet portions 48 and 49' therefore tends to rotate the arm 2| towards the fillet portion 49. The arm 2| is subject, on the one hand, to thetension exerted by the fillet portions 48, 49 upon the roller 22 and, on the other hand, to the opposing pressure exerted by the slide block 26 on the guide bar 25. During the mounting of the fillet, the arm 2| and the guide bar 25 have a position such that the turning moments, with respect to the turning axis of the arm 2| produced by the tension on the fillet and the tension of the spring, which acts upon the slide block, will balance each other. By means of the handle 39, the guid link 3| can be adjusted into a position corresponding to the desired tension on the fillet. Upon a turning movement of the arm 2|, the shaft |5 will be axially displaced to the right or "left relative to the sleeve l2. If the shaft is displaced to the right as viewed in Fig. 1, the frictional pressure between the braking rollers 8, 9 and between the braking roller 8 and the stationary fiange |8 will be rethe fillet.

duced, andvice-versa. Since the braking rollers 8 andv 9 have different diameters, they will rotate relative to each other during the mounting of Any angular position of the arm 2| will thuscorrespond to a certain braking force exerted on the fillet by the rollers 8 and 9. Obviously, the tension on the fillet will be the less, the more the guide link 3|. is moved towards the turn ing axis of the arm 2|, since by such movement the distance between the point at which the tension of the spring acts on the guide bar and the turning aaxis of the arm 2| will be reduced.

If, during the mounting of. the fillet, the tension on the fillet for some reason or other tends to be increased beyond the predetermined value, the force exerted by the fillet on the roller 22 will be increased, with the result that the arm2| will be turned in an anti-clockwisedirection as viewed in Fig. 2. As a result thereof, theshaft 5 will be screwed to the right in the sleeve |2 as viewed in Fig. 1. Consequently, the frictional pressure between the braking rollers 8, 9 and. the stationary flange l8 will be reduced-so much as to maintain constant the initial tension on the fillet. If the tension on the fillet tends to fall below the predetermined value, the arm 2| will be turned in a clockwise direction, with the result that the frictional pressure between the braking rollers 6,, I and the flange It will be increased so that the tendency to reduce the tension on the fillet will be counteracted by the increased braking force exerted by the braking device.

From the above description of the mode of operation of the card mounting machine it follows that the tension on thefillet will under all conditions be automatically maintained constant without the necessity of the mounting machine being controlled by a special workman. .If, for instance, the arm 2| is turned in an anticlockwise direction as viewed in Fig. 2, the distance between the turning axis of the arm 2| and; the fillet portion 49 located between the rollers 22 and 45 will be. increased, with the result that the turning moment exertedby the fillet on the arm 2| will also be increased; said moment acting upon the arm 2| in an anti-clockwise direction. .At the same time, due to the shape of the slot 32 in the guide link, the distance between the turning axis of the arm 2| and the portion of the wire 28' located between the slide block 26 and the roller 21- will be decreased. If the pressure acting on the slide block 26 were constant, the turning moment acting in the clockwise direction would be reduced upon increasing of theturning moment acting in the opposite direction, which would result; in that said turning moments would be brought out of equilibrium and that thedesired tension on the fillet would be changed.

' Such an undesirable inconvenience is avoided due will be moved upwards, with the result that the tension of the spring acting upon the slide block be suificient to maintain the turning moments in equilibrium, the guide link 3| may be given a shape other than that shown in the drawings. For instance, the guide link may have a greater radius of curvature or it may be straight or even curved in a direction opposite to that shown in the drawings. This will be necessary especially in such cases where the slide block 25 is not acted upon by the variable tension of a spring, but instead thereof by a constant force, such as by means of a weight or by a pneumatic or hydraulic pressure device.

In Figs. 3 and 4, there is illustrated a simplified modification of the movable member actuated by the tension on the fillet and by an external load. In Fig. 3, reference numeral 8 again designates one of the two braking rollers, and reference numeral designates the threaded shaft, upon which in the present in instance there is secured a two-armed lever 50, one arm of which carries the freely rotatable roller 22, while the other arm of the lever has secured thereto, as at 5|, one end of the wire 28. The other end of .the wire 28 is at 52 secured to a disc 53 having a spiral groove for the wire. The disc 53 is acted upon by a spring not shown located in a spring case 30. The said spring tends to turn the disc 53 in an anti-clockwise direction as viewed in Fig. 3. The tension of the spring and thus also the magnitude of the external force acting upon the lever 50 can be adjusted by means of a handle 54 adapted to rotate a worm 55 cooperating with a worm wheel 56. The upper portion of the lever 50 is devised as a roller carrier 57 being in the shape of a circular arc and having loosely mounted thereon a number of guide rollers 58,

59. The turning movement of the lever 50 in the clockwise direction is limited by a stop mei ber 50. The lower portion of the lever 55 is provided with a counter-weight 6! for balancing the weight of the roller carrier 51 and the rollers mounted thereon.

The mode of operation of the device described is as follows:

The desired tension on the fillet portion between the roller 22 and the carding drum or roll is adjusted by means of the handle 54 and can be read-off on an indicator 62. If during the mounting of the fillet the tension on the fillet tends to surmount the predetermined value, the force exerted by the fillet portion 49 on the roller 22 will be increased, with the result that the lever 50 will be turned in an anti-clockwise direction. As described in connection with the previous embodiment, the frictional pressure between the braking rollers 8 and 9 and the stationary flange l8 will be reduced so much as to maintain constant the initial tension on the fillet. Should the tension on the fillet tend to be reduced below the predetermined value, the device will operate in the opposite manner.

When the lever 55 is turned, for instance in an anti-clockwise direction, the turning moment with respect to the shaft l5 due to the tension on the fillet will be increased. This increased moment and the increased tension of the spring acting upon the disc 53 will be compensated for due to the spiral shape of the disc 53. Upon turning movement of the lever 59 in the direction named, the disc 53 will be turned in a clockwise direction, with the result that the distance between the turning axis of the disc and the point at which the wire 28 acts on the disc will be in creased.

The direction of the fillet portion 49 is, under otherwise equal conditions, dependent upon the diameter of the drum or roll on which the fillet is to be mounted. Let it be assumed that the direction of the fillet portion 49 corresponds to a drum or roll having the greatest conventional diameter, wheras in the case of a drum or roll having the smallest conventional diameter the fillet would assume the direction indicated at 63. If, in the latter case, the fillet would directly run from the roller 22 to the drum, the turning moment with respect to the shaft l5 due to a certain tension on the fillet would be considerably smaller because of the fact that the distance between the shaft l5 and the fillet would be smaller than in the first named case. This would result in that the indicator 62 would show the real tension on the fillet in connection with a certain diameter only or that it ought to be provided with a number of different scales corresponding to the number of the convenient diameters of the drums, which might easily give rise to incorrect adjustments of the indicator.

The above named inconvenience is avoided due to the arrangement of the guide rollers 58, 59. As will be seen from Fig. 3, the distance 64 between the turning axis of the lever 50 and the fillet portion 49 is substantially equal to the distance 65 between the turning axis of the lever and the fillet portion 63 running from the guide roller 59 to the drum. Also the distance 66 between the turning axis of the lever 50 and a fillet portion 51 running from the guide roller 58 to a drum having a medium-sized diameter has substantially the same value. It will be obvious that the greater the number of the guide rollers 58, 59, the more exactly will the turning moment due to the tension on the fillet be maintained constant. For practical purposes, two or three guide rollers will be sufiicient. If carding drums or rolls with slightly varying diameters are used, one additional guide roller will be sufiicient. It will be evident that the turning moment due to the tension on the fillet may be maintained constant by lifting or lowering the card mounting machine to such an extent that a plane meeting the upper faces of the drum or roll and the roller 22 will be inclined at a constant angle with respect of the horizontal plane irrespective of the diameter of the drum or roll.

As will be seen from Fig. 2, the card mounting machine can be easily removed from the guide bars 5 and 6 by swinging it through a small angle about the bar 6 in a clockwise direction so as to disengage the claw 3 from the bar 5, whereupon the machine, which constitutes a constructional unit, can be removed from the bar 6. In a similar simple manner, the machine can be placed upon the bars 5 and 6.

It will be understood that the invention is not limited to the embodiments described, but includes a number of modifications within the scope of the appended claims.

What I claim is:

1. A card mounting machine for mounting a fillet of card clothing on acarding drum, said machine comprising an adjustable braking device engaged by the backv of-the fillet, a freely rotatable roller for guiding the fillet portion located between said braking device and said drum,. an arm carrying said roller and supported for pivotal movement about an axis displaced from the medialplane of the fillet sections at opposite sides of said roller, whereby the tension of said fillet tends to rock said arm, means for applying to said arm a preselected force to oppose rocking thereof by the fillet tension, and means operated by said arm upon rocking thereof by a change in fillet tension to actuate the braking device to neutralize the change in fillet tension.

2. A card mounting machine for mounting a fillet of card clothing on a carding drum, said machine comprising an adjustable braking device engaged by the back of the fillet, a freely rotatable roller for guiding the fillet portion located between said braking device and said drum, an arm carrying said roller and-supported for pivotal movement about an axis displaced from the medial plane of the fillet sections at opposite sides of said roller, whereby the tension of said fillet tends to rock said arm, a slide block movable longitudinally of said arm, means for applying a force to said slide block to oppose rocking of said arm by the fillet tension, and means operated by movement of said arm to adjust said braking device to restore the fillet tension to a selected value determined by said opposing force and the adjustment of said slide block.

3. A card mounting machine as recited in claim 2, wherein a guide bar is disposed parallel to and connected to said arm, and said slide block is movably supported on said guide arm.

4. A card mounting machine for mounting a fillet of card clothing on a carding drum, comprising a braking device for said fillet, a-1ever having a guide surface for the fillet portion located between said braking device and said drum, whereby the tension on the fillet tends to rock the lever, a slide block'movablelongitudinally of said lever, a guide link for guiding said slide block, said guide link being manually movable for varying the distance between said slide block and the fulcrum of said lever, means for applying a force to said slide block, means for transmitting said force from said slide'block to said lever, whereby to counteract the force exerted on said lever due to said tension, and meansoperated by said lever to actuate said brakingdevice in response to a tendency to variations of the tension on said fillet so as to maintain constant said tension.

5. A card mounting mahine as claimed in claim 4, wherein said guide link has the shape of a circular arc.

6. A card mounting machine as claimed in claim 4, wherein said guide link hasthe shape of a circular arc, the center of said circular arc cinciding with the fulcrum of said lever.

7. A card mounting machine for mounting a fillet of card clothing, on a carding drum, comprising a braking device for saidfillet, a lever, a roller mountedpn said lever and over which is drawn the fillet portion, located between said braking device and said drum, a slide block movable longitudinally of said lever, a guide link for guiding said slide block, said guide link being manually movable for varying the distance between said slide block and the fulcrum of said lever, means for applying, a force to said slide block, means for transmitting said force. from said slide block to said lever, to oppose the turning force exerted on said lever by said fillet portion,

and means operated by said lever to actuate said braking device in response to a tendencyto'variations of the tension on said'fillet so as to maintainconstant said tension,.said guide link being shaped so as to counterbalance variations in the turning moments exerted on said lever during the turning movement thereof.

a. In a card mounting; machine for mounting, a. fillet of card clothing on a carding drum. a. braking device for said fillet, a lever, a roller: mounted on said lever, said roller being subject to the tension on the fillet portion located between said braking device andsaid drum, 2. slidehlock movable longitudinally ofsaid lever, a guide link for guiding said slide. block, said guide link being manually movable for varying the distance between said: slide block. and the fulcrum of said lever, means. for applying a force to said slide block, means for transmitting said force from said slide block to said lever,. whereby to counteract the force exerted on said lever due to said tension, and means associated with said guide link for indicating said tension.

9. A card mounting machine for mounting a fillet of card clothing on a carding drum, comprising a braking device for said fillet, a, lever, a. roller mounted on said lever for guiding the fillet portion located between said braking device and said drum, a rotatably mounted disc, a cord connecting said disc with said lever, resilient means tending to turn said disc in a direction such as to counteract the force exerted onsaid roller and said lever by said fillet portion, the distance be-. tween the axis of said disc and the point at which said cord meets the periphery of said disc being variable upon rotation of said disc, and operated by said lever to actuate said braking device in response to a tendency to variations of the ten sicn on said fillet so as to maintain constant said 40 tension.

10. A card mounting machine for mounting a fillet of card clothing on a carding drum, comprising a braking device for said fillet, a lever, a roller mounted on said lever for guiding the fillet portion located between said braking device and said drum, a rotatably mounted disc having a. spirally shaped periphery, a cord connecting the periphery of said disc with. said lever, resilient means tending to turn said discin a direction such as to counteract the force exerted on said roller and said lever by said fillet portion, and means operated by said lever to actuate said braking device in response to a tendency to variations of the tension on said fillet so as to maintain constant said tension.

11. A card mounting machine for mounting a, fillet of card clothing on a carding drum, comprising a braking device for said fillet, a lever, a roller mounted on said lever for guiding the fillet portion located between said braking device and said drum, a rotatably mounted disc having a spirally shaped periphery, a cord connecting the periphery of said disc with said lever, resilient means tending to turn said disc in a direction such as to counteract the forceex'erted on-said roller and said lever by said fillet portion, and means associated with said resilient means for varying the resilient force thereof and indicating the tension on the fillet. 12. A card mounting machine for mounting a. fillet of card clothing on a carding drum, comprising a braking device for said fillet, a lever, a. roller mounted on said lever for guiding the fillet portion located between said braking device and said drum, means counteracting-the'fcrce exerted on said roller and said lever by said fillet portion, means operated by said lever to actuate said braking device in response to a tendency to variations of the tension on said fillet so as to maintain constant said tension, a roller carrier connected to said lever, and a plurality of fillet guide rollers mounted on said carrier, the axes of all of said rollers being located on a substantially circular arc, and the center of said are substantially coinciding with the fulcrum of said lever.

13. A card mounting machine for mounting a fillet of card clothing on a carding drum, comprising at least one braking roller having a friction coating for engagement by said fillet, a stationary member in frictional contact with said braking roller, means mounted for movement in response to the tension on the fillet portion located between said braking roller and said drum, means opposing the force exerted on said movably mounted means by said fillet portion, and means operated by said movably mounted means to vary the frictional contact between said stationary member and said braking roller in response to variations in the tension on said fillet portion, whereby to maintain constant said ten- 14. A card mounting machine for mounting a fillet of card clothing on a carding drum, comprising at least two braking rollers having friction coatings for said fillet and having frictional contact with each other, a movable arm responsive to the tension on the fillet portion located between said braking rollers and said drum, means counteracting the force exerted on said movable arm by said fillet portion, and means operated by said movable member to vary the frictional contact between said braking rollers in response to variations in the tension on said fillet portion, whereby to maintain constant said tension.

15. A card mounting machine for mounting a fillet of card clothing on a carding drum, comprising at least one braking roller having a friction coating for said fillet, a friction member engaging an end of the braking roller, a stationary hollow cylindrical member constituting a bearing for said braking roller and having internal threads, a threaded shaft arranged to cooperate with the internal threads on said cylindrical member, a member secured to said shaft and movable in response to the tension on the fillet portion located between said braking roller and said drum, and means counteracting the force exerted on said movable member by said fillet portion, said movable member rotating said shaft in response to variations in the tension on said fillet portion to vary the frictional engagement between said friction member and said braking roller and thereby to maintain constant the tension on said fillet portion.

16. A card mounting machine for mounting a fillet of card clothing on a carding drum, comprising a braking device for said fillet, a movable member actuated by the tension on the fillet portion located between said braking device and said drum, means for counteracting the force exerted on said movable member by said fillet portion, a guide bar, and means for supporting said braking device, movable member and counteracting means on said guide bar; said supporting means including a saddle-shaped portion resting upon and slidable along said guide bar.

17. A card mounting machine comprising the combination with a plurality of rolls over which the fillet of card clothing passes, a pivoted lever having guide means over which the fillet is drawn as it passes from said rolls, the tension on the fillet tending to rock the lever in one direction, tension adjusting means for applying a force to said lever to oppose rocking thereof by the fillet tension, and adjustable braking means imposing a frictional resistance to travel of the fillet; of means actuated by said lever on movement in response to a variation of fillet tension adjusts said braking device to restore the tension to a desired value.

18. A card mounting machine as recited in claim 17, wherein said braking means comprises means for imposing a frictional resistance to the rotation of one of said guide rolls.

19. A card mounting machine as recited in claim 17, wherein said tension adjusting means includes means for adjusting the point of application of the applied force longitudinally of said lever.

20. A card mounting machine for mounting a fillet of card clothing on a carding drum, said machine comprising braking means for imposing a frictional resistance to movement of the fillet, guide means over which said fillet is drawn on its travel from said braking means to the carding drum, means supporting said guide means for movement in response to the tension on the fillet between the braking means and the drum, means for applying to said guide means a force opposing movement of the guide means by the fillet tension, and means actuated by movement of said guide means to adjust said braking means to maintain a substantially constant tension on the fillet.

ANDRE HEINRICH SCHAUB. 

